/* ziwei-power 前端逻辑 — Flomo 风格左右布局 */
(function() {
  'use strict';

  /* ================================================================
     State
     ================================================================ */
  var calendarStatus = {};    // { "2026-06-01": "pass", ... }
  var calYear, calMonth;     // 日历显示的月份
  var activePanel = 'daily'; // 当前面板
  var weekOffset = 0;        // 每周评分偏移
  var lastSavedData = null;  // 上次保存快照
  var lastSavedDate = null;  // 上次保存日期
  var selectedDate = null;   // 日历中选中日期

  /* 勤学预设项目 */
  var PRESET_STUDY_ITEMS = [
    '晚上 11 点 30 之前睡觉',
    '早上 6 点 30 之前起床',
    '起床后做 30 个俯卧撑',
    '销售客情能力提升',
    '管理能力提升',
    '产品规划有进一步的提升',
    'AI 能力提升',
    '知识库能力提升'
  ];

  /* ================================================================
     Toast
     ================================================================ */
  var toastTimer = null;
  function showToast(msg, type) {
    type = type || 'info';
    var el = document.getElementById('toast');
    el.textContent = msg;
    el.className = 'toast ' + type + ' show';
    clearTimeout(toastTimer);
    toastTimer = setTimeout(function(){ el.classList.remove('show'); }, 2500);
  }

  /* ================================================================
     API
     ================================================================ */
  function apiGetCheckin(date, cb) {
    fetch('/api/checkin?date=' + encodeURIComponent(date))
      .then(function(r){ return r.json(); })
      .then(function(res){ if (res.ok) cb(null, res.data); else cb(res.error); })
      .catch(function(e){ cb(e.message); });
  }

  function apiSaveCheckin(date, data, cb) {
    fetch('/api/checkin', {
      method: 'POST',
      headers: {'Content-Type': 'application/json'},
      body: JSON.stringify({date: date, data: data})
    })
      .then(function(r){ return r.json(); })
      .then(function(res){ if (res.ok) cb(null); else cb(res.error); })
      .catch(function(e){ cb(e.message); });
  }

  function apiDeleteCheckin(date, cb) {
    fetch('/api/checkin/' + encodeURIComponent(date), {method: 'DELETE'})
      .then(function(r){ return r.json(); })
      .then(function(res){ if (res.ok) cb(null); else cb(res.error); })
      .catch(function(e){ cb(e.message); });
  }

  function apiGetHistory(cb) {
    fetch('/api/history')
      .then(function(r){ return r.json(); })
      .then(function(res){ if (res.ok) cb(null, res.data); else cb(res.error); })
      .catch(function(e){ cb(e.message); });
  }

  function apiGetStats(cb) {
    fetch('/api/stats')
      .then(function(r){ return r.json(); })
      .then(function(res){ if (res.ok) cb(null, res.data); else cb(res.error); })
      .catch(function(e){ cb(e.message); });
  }

  /* ================================================================
     Escaping
     ================================================================ */
  function esc(s) {
    return String(s).replace(/&/g,'&amp;').replace(/"/g,'&quot;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
  }

  /* ================================================================
     Panel Switching
     ================================================================ */
  window.switchPanel = function(name) {
    activePanel = name;
    var navs = document.querySelectorAll('.sidebar-nav .nav-item');
    var panels = document.querySelectorAll('.main-content .panel');

    for (var i=0; i<navs.length; i++) navs[i].classList.remove('active');
    for (var j=0; j<panels.length; j++) panels[j].classList.remove('active');

    var nav = document.querySelector('.nav-item[data-panel="' + name + '"]');
    var panel = document.getElementById('panel-' + name);
    if (nav) nav.classList.add('active');
    if (panel) panel.classList.add('active');

    if (name === 'weekly') loadWeekly();
    if (name === 'history') loadHistory();
    if (name === 'wishes') loadWishes();
  };

  /* ================================================================
     Calendar
     ================================================================ */

  /** 格式化日期 */
  function fmtDate(d) {
    var y = d.getFullYear();
    var m = ('0'+(d.getMonth()+1)).slice(-2);
    var dd = ('0'+d.getDate()).slice(-2);
    return y + '-' + m + '-' + dd;
  }

  /** 判断两个日期是否同一天 */
  function isSameDay(a, b) {
    return a.getFullYear() === b.getFullYear() &&
           a.getMonth() === b.getMonth() &&
           a.getDate() === b.getDate();
  }

  /** 切换日历月份 */
  window.changeCalMonth = function(dir) {
    calMonth += dir;
    if (calMonth > 12) { calMonth = 1; calYear++; }
    if (calMonth < 1)  { calMonth = 12; calYear--; }
    renderCalendar();
  };

  /** 渲染日历 */
  function renderCalendar() {
    var today = new Date();
    var firstDay = new Date(calYear, calMonth - 1, 1);
    var lastDay = new Date(calYear, calMonth, 0);
    var startDayOfWeek = firstDay.getDay(); // 0=Sun
    var totalDays = lastDay.getDate();
    var prevMonthLastDay = new Date(calYear, calMonth - 1, 0).getDate();

    // 月份标签
    document.getElementById('cal-month-label').textContent =
      calYear + '年 ' + calMonth + '月';

    var grid = document.getElementById('cal-grid');
    var html = '';

    // 前月填充
    for (var p = startDayOfWeek - 1; p >= 0; p--) {
      html += '<div class="cal-cell other-month">' + (prevMonthLastDay - p) + '</div>';
    }

    // 当月
    for (var d = 1; d <= totalDays; d++) {
      var cur = new Date(calYear, calMonth - 1, d);
      var ds = fmtDate(cur);
      var classes = ['cal-cell'];
      var isOtherMonth = false;

      if (isSameDay(cur, today)) classes.push('today');
      if (ds === selectedDate) classes.push('selected');
      var status = calendarStatus[ds];
      if (status) classes.push(status);

      html += '<div class="' + classes.join(' ') + '" data-date="' + ds + '">' + d + '</div>';
    }

    // 后月填充 — 始终 42 格（6行 × 7列），保持高度一致
    var totalCells = startDayOfWeek + totalDays;
    var remaining = 42 - totalCells;
    for (var n = 1; n <= remaining; n++) {
      html += '<div class="cal-cell other-month">' + n + '</div>';
    }

    grid.innerHTML = html;

    // 点击事件
    grid.querySelectorAll('.cal-cell:not(.other-month)').forEach(function(cell) {
      cell.addEventListener('click', function() {
        var date = this.dataset.date;
        if (date) navigateToDate(date);
      });
    });
  }

  /** 导航到指定日期 */
  function navigateToDate(date) {
    selectedDate = date;
    switchPanel('daily');
    document.getElementById('check-date').value = date;
    loadCheckin();
    renderCalendar(); // 刷新日历高亮
  }

  /** 回到今天 */
  window.goToday = function() {
    var today = fmtDate(new Date());
    calYear = new Date().getFullYear();
    calMonth = new Date().getMonth() + 1;
    renderCalendar();
    navigateToDate(today);
  };

  /* ================================================================
     Stats — 加载统计数据并更新侧边栏
     ================================================================ */
  function loadStats() {
    apiGetStats(function(err, data) {
      if (!err && data) {
        document.getElementById('stat-days').textContent = data.total_days;
        document.getElementById('stat-morning').textContent = data.total_morning;
        document.getElementById('stat-study').textContent = data.total_study;
        calendarStatus = data.calendar || {};
      }
      renderCalendar();
    });
  }

  /* ================================================================
     Build / Fill Data
     ================================================================ */

  function buildData() {
    var morningItems = [];
    var mEls = document.querySelectorAll('#morning-list .item-row input');
    for (var i=0; i<mEls.length; i++) {
      var v = mEls[i].value.trim();
      if (v) morningItems.push(v);
    }

    var eveningItems = [];
    var eRows = document.querySelectorAll('#evening-list .evening-row');
    for (var j=0; j<eRows.length; j++) {
      var cols = eRows[j].querySelectorAll('.col input');
      var mistake = cols[0] ? cols[0].value.trim() : '';
      var improve = cols[1] ? cols[1].value.trim() : '';
      if (mistake || improve) eveningItems.push({ mistake: mistake, improvement: improve });
    }

    var studyItems = [];
    var pItems = document.querySelectorAll('#study-list .preset-item');
    for (var k=0; k<pItems.length; k++) {
      var cb = pItems[k].querySelector('input[type="checkbox"]');
      var noteEl = pItems[k].querySelector('.preset-note');
      var nameEl = pItems[k].querySelector('.preset-name');
      var name = nameEl ? nameEl.textContent : '';
      if (cb && cb.checked) {
        studyItems.push({ name: name, done: true, note: noteEl ? noteEl.value.trim() : '' });
      } else {
        studyItems.push({ name: name, done: false, note: '' });
      }
    }

    return { morning: morningItems, evening: eveningItems, study: studyItems };
  }

  function fillForm(data) {
    data = data || {};
    var morning = data.morning || [];
    var evening = data.evening || [];
    var study = data.study || [];

    // 早间立志
    document.getElementById('morning-list').innerHTML = '';
    if (morning.length === 0) morning = [''];
    for (var m=0; m<morning.length; m++) addMorningRow(morning[m]);

    // 责善改过
    document.getElementById('evening-list').innerHTML = '';
    if (evening.length === 0) evening = [{}];
    for (var e=0; e<evening.length; e++) {
      var item = typeof evening[e] === 'string' ? {mistake: evening[e], improvement: ''} : evening[e];
      addEveningRow(item.mistake || '', item.improvement || '');
    }

    // 勤学 — 渲染预设项目并回填状态
    var studyMap = {};
    for (var si=0; si<study.length; si++) {
      studyMap[study[si].name] = study[si];
    }
    document.getElementById('study-list').innerHTML = '';
    for (var sp=0; sp<PRESET_STUDY_ITEMS.length; sp++) {
      var sName = PRESET_STUDY_ITEMS[sp];
      var saved = studyMap[sName] || { done: false, note: '' };
      addPresetItem(sName, saved.done, saved.note || '');
    }
  }

  /* ================================================================
     Dynamic Rows
     ================================================================ */

  function addMorningRow(val) {
    var container = document.getElementById('morning-list');
    var idx = container.children.length;
    val = val || '';
    var div = document.createElement('div');
    div.className = 'item-row';
    div.innerHTML = '<span class="idx">' + (idx+1) + '.</span>' +
      '<input type="text" value="' + esc(val) + '" placeholder="今天最重要的一件事…">' +
      '<button class="btn-del" onclick="this.parentElement.remove();renumberMorning()"><svg class="icon-sm"><use href="#icon-x"/></svg></button>';
    container.appendChild(div);
    renumberMorning();
  }

  function renumberMorning() {
    var rows = document.querySelectorAll('#morning-list .item-row');
    for (var i=0; i<rows.length; i++) {
      var span = rows[i].querySelector('.idx');
      if (span) span.textContent = (i+1) + '.';
    }
  }

  function addEveningRow(mistake, improve) {
    var container = document.getElementById('evening-list');
    var idx = container.children.length;
    mistake = mistake || '';
    improve = improve || '';
    var div = document.createElement('div');
    div.className = 'evening-row';
    div.innerHTML =
      '<div class="evening-header">' +
        '<span class="idx">' + (idx+1) + '.</span>' +
        '<button class="btn-del" onclick="this.parentElement.parentElement.remove();renumberEvening()"><svg class="icon-sm"><use href="#icon-x"/></svg></button>' +
      '</div>' +
      '<div class="mistake-row">' +
        '<div class="col"><label>错误</label><input type="text" value="' + esc(mistake) + '" placeholder="今天犯的错…"></div>' +
        '<div class="col"><label>改进方案</label><input type="text" value="' + esc(improve) + '" placeholder="下次怎么做…"></div>' +
      '</div>';
    container.appendChild(div);
    renumberEvening();
  }

  function renumberEvening() {
    var rows = document.querySelectorAll('#evening-list .evening-row');
    for (var i=0; i<rows.length; i++) {
      var span = rows[i].querySelector('.idx');
      if (span) span.textContent = (i+1) + '.';
    }
  }

  /* ── 勤学预设项目 ── */

  function addPresetItem(name, done, note) {
    var container = document.getElementById('study-list');
    var div = document.createElement('div');
    div.className = 'preset-item' + (done ? ' active' : '');
    var noteEsc = esc(note || '');
    div.innerHTML =
      '<label class="preset-check">' +
        '<input type="checkbox"' + (done ? ' checked' : '') + ' onchange="togglePresetNote(this)">' +
        '<span class="preset-name">' + esc(name) + '</span>' +
      '</label>' +
      '<textarea class="preset-note" placeholder="一句话备注…">' + noteEsc + '</textarea>';
    container.appendChild(div);
  }

  window.togglePresetNote = function(cb) {
    var item = cb.closest('.preset-item');
    if (item) {
      if (cb.checked) item.classList.add('active');
      else { item.classList.remove('active'); item.querySelector('.preset-note').value = ''; }
    }
    triggerAutoSave();
  };

  function initStudyPresets() {
    document.getElementById('study-list').innerHTML = '';
    for (var i=0; i<PRESET_STUDY_ITEMS.length; i++) {
      addPresetItem(PRESET_STUDY_ITEMS[i], false, '');
    }
  }

  window.addMorning = function() {
    var count = document.querySelectorAll('#morning-list .item-row').length;
    if (count >= 3) { showToast('最多 3 条立志', 'error'); return; }
    addMorningRow('');
  };
  window.addEvening = function() {
    var count = document.querySelectorAll('#evening-list .evening-row').length;
    if (count >= 5) { showToast('最多 5 条改过', 'error'); return; }
    addEveningRow('', '');
  };

  /* 切换卡片编辑模式 */
  window.toggleEditMode = function(btn) {
    var card = btn.closest('.card');
    if (!card) return;
    var editing = card.classList.toggle('editing');
    btn.classList.toggle('active', editing);
  };

  /* ================================================================
     Load & Auto Save Checkin
     ================================================================ */

  window.loadCheckin = function() {
    var date = document.getElementById('check-date').value;
    if (!date) return;

    // 切换日期前先保存当前数据
    var currentData = buildData();
    var currentStr = JSON.stringify(currentData);
    if (lastSavedDate && lastSavedData !== null && currentStr !== lastSavedData) {
      // 有未保存的变更，先静默保存
      var hasContent = currentData.morning.some(function(x){return x && x.trim();}) ||
                       currentData.evening.some(function(x){return (x.mistake||'').trim() || (x.improvement||'').trim();}) ||
                       currentData.study.some(function(x){return x.done;});
      if (hasContent) {
        apiSaveCheckin(lastSavedDate, currentData, function(){}); // 静默保存
      }
    }

    lastSavedDate = date;
    apiGetCheckin(date, function(err, row){
      if (err) { initStudyPresets(); lastSavedData = '{}'; return; }
      fillForm(row ? row.data : null);
      lastSavedData = JSON.stringify(buildData());
    });
  };

  /** 自动保存 — 失去焦点/勾选/删除时触发 */
  function triggerAutoSave() {
    var date = document.getElementById('check-date').value;
    if (!date) return;
    var data = buildData();
    var dataStr = JSON.stringify(data);
    if (dataStr === lastSavedData) return;
    apiSaveCheckin(date, data, function(err){
      if (err) { showToast('保存失败', 'error'); return; }
      lastSavedData = dataStr;
      loadStats();
    });
  }

  /** 为每日打卡面板绑定自动保存事件 */
  function bindAutoSave() {
    var panel = document.getElementById('panel-daily');
    if (!panel) return;

    // 输入框 & 文本域：失去焦点时保存
    panel.addEventListener('blur', function(e) {
      if (e.target.matches('input[type="text"], textarea, input[type="date"]')) {
        triggerAutoSave();
      }
    }, true);

    // 复选框：change 事件
    panel.addEventListener('change', function(e) {
      if (e.target.matches('input[type="checkbox"]')) {
        triggerAutoSave();
      }
    });

    // 删除行按钮：点击后触发
    panel.addEventListener('click', function(e) {
      var btn = e.target.closest('.btn-del');
      if (btn) {
        setTimeout(triggerAutoSave, 100); // 等 DOM 更新后
      }
    });
  }

  /* ================================================================
     Weekly Score
     ================================================================ */
  var WEEKDAYS_CN = ['日','一','二','三','四','五','六'];

  function getMonday(d) {
    var day = d.getDay();
    var diff = d.getDate() - day + (day === 0 ? -6 : 1);
    var m = new Date(d);
    m.setDate(diff);
    return m;
  }

  window.changeWeek = function(dir) {
    weekOffset += dir;
    loadWeekly();
  };

  function loadWeekly() {
    var today = new Date();
    today.setDate(today.getDate() + weekOffset * 7);
    var monday = getMonday(today);
    var sunday = new Date(monday);
    sunday.setDate(monday.getDate() + 6);

    document.getElementById('week-label').textContent =
      fmtDate(monday) + ' ~ ' + fmtDate(sunday);

    apiGetHistory(function(err, rows){
      if (err) { showToast('加载失败', 'error'); return; }
      var map = {};
      for (var i=0; i<rows.length; i++) map[rows[i].date] = rows[i].data;

      var totalDays = 0, totalScore = 0, dayCells = [];

      for (var j=0; j<7; j++) {
        var cur = new Date(monday);
        cur.setDate(monday.getDate() + j);
        var ds = fmtDate(cur);
        var dd = map[ds];

        if (dd) {
          totalDays++;
          var morning = dd.morning || [];
          var evening = dd.evening || [];
          var study = dd.study || [];

          var morningCount = morning.filter(function(x){ return x && typeof x === 'string' && x.trim(); }).length;
          var eveningCount = evening.filter(function(x){
            var mst = typeof x === 'string' ? x : (x.mistake || '');
            return mst && typeof mst === 'string' && mst.trim();
          }).length;
          var studyCount = study.filter(function(x){ return x.done; }).length;

          var allThree = morningCount > 0 && eveningCount > 0 && studyCount > 0;
          var dayScore, status;
          if (allThree) {
            dayScore = 60 + (morningCount - 1 + eveningCount - 1 + studyCount - 1) * 5;
            status = 'pass';
          } else {
            dayScore = (morningCount + eveningCount + studyCount) * 5;
            status = 'fail';
          }
          totalScore += dayScore;

          dayCells.push({
            ds: ds, dayScore: dayScore, status: status,
            weekday: '周' + WEEKDAYS_CN[cur.getDay()]
          });
        } else {
          dayCells.push({
            ds: ds, dayScore: 0, status: 'empty',
            weekday: '周' + WEEKDAYS_CN[cur.getDay()]
          });
        }
      }

      var score = totalScore;
      document.getElementById('weekly-score').textContent = score;

      var ring = document.querySelector('.score-ring');
      if (ring) {
        var R = 50, C = 2 * Math.PI * R;
        ring.setAttribute('stroke-dasharray', C);
        ring.setAttribute('stroke-dashoffset', C - (C * totalDays / 7));
      }

      var txt = '';
      if (totalDays >= 7) txt = '全勤！本周每天都有记录';
      else if (totalDays >= 5) txt = '良好，保持了大部分记录';
      else if (totalDays >= 3) txt = '一般，需要更规律打卡';
      else txt = '本周记录偏少，加油！';
      document.getElementById('score-text').textContent = txt;

      var completedDays = dayCells.filter(function(c){ return c.status === 'pass'; }).length;
      var totalFilled = dayCells.filter(function(c){ return c.status !== 'empty'; }).length;
      document.getElementById('score-stats').textContent =
        '本周填卡 ' + totalFilled + '/7 天 · 达标 ' + completedDays + ' 天';

      var gridHtml = '';
      for (var g=0; g<dayCells.length; g++) {
        var cell = dayCells[g];
        var dateParts = cell.ds.split('-');
        var shortDate = dateParts[1] + '/' + dateParts[2];
        var badgeText = cell.status === 'pass' ? '达标' : (cell.status === 'fail' ? '未达标' : '未打卡');
        gridHtml += '<div class="day-cell ' + cell.status + '">' +
          '<div class="day-label">' + cell.weekday + '</div>' +
          '<div class="day-date">' + shortDate + '</div>' +
          '<div class="day-score">' + cell.dayScore + '<span style="font-size:11px;font-weight:400">分</span></div>' +
          '<div class="day-badge">' + badgeText + '</div>' +
          '</div>';
      }
      document.getElementById('week-days-grid').innerHTML = gridHtml;
    });
  }

  /* ================================================================
     History
     ================================================================ */
  function loadHistory() {
    apiGetHistory(function(err, rows){
      var el = document.getElementById('history-grid');
      if (err) {
        el.innerHTML = '<div class="empty-state"><div class="empty-icon"><svg viewBox="0 0 24 24"><use href="#icon-list-bullet"/></svg></div>加载失败</div>';
        return;
      }
      if (!rows || rows.length === 0) {
        el.innerHTML = '<div class="empty-state"><div class="empty-icon"><svg viewBox="0 0 24 24"><use href="#icon-list-bullet"/></svg></div>暂无历史记录</div>';
        return;
      }

      var html = '';
      for (var i=0; i<rows.length; i++) {
        var r = rows[i];
        var morning = (r.data.morning || []).filter(function(x){ return x && typeof x === 'string' && x.trim(); });
        var evening = (r.data.evening || []).filter(function(x){
          var mst = typeof x === 'string' ? x : (x.mistake || '');
          return mst && typeof mst === 'string' && mst.trim();
        });
        var study = (r.data.study || []).filter(function(x){ return x.done; });

        var tags = [];
        if (morning.length) tags.push('<span><svg class="icon-xs" style="color:var(--primary)"><use href="#icon-sun"/></svg> 立志 ' + morning.length + '</span>');
        if (evening.length) tags.push('<span><svg class="icon-xs" style="color:var(--danger)"><use href="#icon-magnifying-glass"/></svg> 改过 ' + evening.length + '</span>');
        if (study.length) tags.push('<span><svg class="icon-xs" style="color:#059669"><use href="#icon-book-open"/></svg> 勤学 ' + study.length + '</span>');

        html += '<div class="history-card">' +
          '<div class="info">' +
            '<div class="date">' + r.date + '</div>' +
            '<div class="preview">' + (tags.join('') || '暂无内容') + '</div>' +
          '</div>' +
          '<button class="btn-del-history" onclick="deleteHistory(\'' + r.date + '\')"><svg class="icon-xs"><use href="#icon-trash"/></svg> 删除</button>' +
        '</div>';
      }
      el.innerHTML = html;
    });
  }

  window.deleteHistory = function(date) {
    if (!confirm('确定删除 ' + date + ' 的打卡记录吗？此操作不可恢复！')) return;
    apiDeleteCheckin(date, function(err){
      if (err) { showToast('删除失败: ' + err, 'error'); return; }
      showToast('已删除', 'info');
      loadHistory();
      loadStats(); // 更新统计
    });
  };

  /* ================================================================
     Wishes — 心愿清单
     ================================================================ */
  var wishes = [];
  var dragSourceId = null;
  var wishesLoaded = false;

  function loadWishes() {
    if (wishesLoaded) { renderWishes(); return; }
    // 优先使用页面嵌入数据
    if (window.__INITIAL_WISHES__) {
      wishes = window.__INITIAL_WISHES__;
      wishesLoaded = true;
      renderWishes();
      return;
    }
    fetch('/api/wishes')
      .then(function(r){ return r.json(); })
      .then(function(res){ if (res.ok) { wishes = res.data; wishesLoaded = true; renderWishes(); } });
  }

  function renderWishes() {
    var list = document.getElementById('wishes-list');
    var empty = document.getElementById('wishes-empty');
    if (!list) return;
    if (wishes.length === 0) {
      list.innerHTML = '';
      if (empty) empty.style.display = 'block';
      return;
    }
    if (empty) empty.style.display = 'none';
    var html = '';
    for (var i = 0; i < wishes.length; i++) {
      var w = wishes[i];
      var doneCls = w.done ? ' done' : '';
      var priCls = 'pri-' + (w.priority || '中');
      var deadline = w.deadline ? w.deadline : '';
      html += '<div class="wish-item' + doneCls + '" draggable="true" data-id="' + w.id + '">' +
        '<span class="wish-drag-handle"><svg class="icon-xs"><use href="#icon-list-bullet"/></svg></span>' +
        '<input type="checkbox" class="wish-check" ' + (w.done ? 'checked' : '') + ' onchange="toggleWish(' + w.id + ', this.checked)">' +
        '<span class="wish-name" title="' + esc(w.name) + '">' + esc(w.name) + '</span>' +
        '<span class="wish-pri ' + priCls + '">' + esc(w.priority) + '</span>' +
        (deadline ? '<span class="wish-deadline">' + esc(deadline) + '</span>' : '') +
        '<button class="btn-del wish-del" onclick="deleteWishItem(' + w.id + ')"><svg class="icon-xs"><use href="#icon-x"/></svg></button>' +
      '</div>';
    }
    list.innerHTML = html;
    bindDragEvents();
  }

  /* ── Drag & Drop ── */

  function bindDragEvents() {
    var items = document.querySelectorAll('#wishes-list .wish-item');
    items.forEach(function(item) {
      item.addEventListener('dragstart', function(e) {
        dragSourceId = parseInt(this.dataset.id);
        this.classList.add('dragging');
        e.dataTransfer.effectAllowed = 'move';
      });
      item.addEventListener('dragend', function(e) {
        this.classList.remove('dragging');
        dragSourceId = null;
        // 移除所有 over 状态
        document.querySelectorAll('#wishes-list .wish-item').forEach(function(el){ el.classList.remove('drag-over'); });
      });
      item.addEventListener('dragover', function(e) {
        e.preventDefault();
        e.dataTransfer.dropEffect = 'move';
        this.classList.add('drag-over');
      });
      item.addEventListener('dragleave', function() {
        this.classList.remove('drag-over');
      });
      item.addEventListener('drop', function(e) {
        e.preventDefault();
        this.classList.remove('drag-over');
        var targetId = parseInt(this.dataset.id);
        if (dragSourceId === targetId) return;
        // 更新本地顺序
        var fromIdx = -1, toIdx = -1;
        for (var j = 0; j < wishes.length; j++) {
          if (wishes[j].id === dragSourceId) fromIdx = j;
          if (wishes[j].id === targetId) toIdx = j;
        }
        if (fromIdx >= 0 && toIdx >= 0) {
          var item = wishes.splice(fromIdx, 1)[0];
          wishes.splice(toIdx, 0, item);
          renderWishes();
          saveWishOrder();
        }
      });
    });
  }

  function saveWishOrder() {
    var order = wishes.map(function(w){ return w.id; });
    fetch('/api/wishes/reorder', {
      method: 'PUT',
      headers: {'Content-Type': 'application/json'},
      body: JSON.stringify({order: order})
    });
  }

  /* ── CRUD ── */

  window.showWishForm = function() {
    var form = document.getElementById('wish-form');
    if (form) form.style.display = 'block';
  };

  window.hideWishForm = function() {
    var form = document.getElementById('wish-form');
    if (form) form.style.display = 'none';
    document.getElementById('wish-name').value = '';
    document.getElementById('wish-deadline').value = '';
    document.getElementById('wish-priority').value = '中';
  };

  window.addWish = function() {
    var name = document.getElementById('wish-name').value.trim();
    if (!name) { showToast('请输入心愿名称', 'error'); return; }
    var priority = document.getElementById('wish-priority').value;
    var deadline = document.getElementById('wish-deadline').value;
    fetch('/api/wishes', {
      method: 'POST',
      headers: {'Content-Type': 'application/json'},
      body: JSON.stringify({name: name, priority: priority, deadline: deadline})
    }).then(function(r){ return r.json(); })
      .then(function(res){
        if (!res.ok) { showToast(res.error, 'error'); return; }
        hideWishForm();
        wishes.push({id: res.id, name: name, priority: priority, deadline: deadline, done: 0});
        renderWishes();
      });
  };

  window.toggleWish = function(id, done) {
    fetch('/api/wishes/' + id, {
      method: 'PUT',
      headers: {'Content-Type': 'application/json'},
      body: JSON.stringify({done: done ? 1 : 0})
    });
    var w = wishes.find(function(x){ return x.id === id; });
    if (w) w.done = done ? 1 : 0;
    renderWishes();
  };

  window.deleteWishItem = function(id) {
    fetch('/api/wishes/' + id, {method: 'DELETE'});
    wishes = wishes.filter(function(w){ return w.id !== id; });
    renderWishes();
  };

  window.toggleWishesEdit = function(btn) {
    var panel = document.getElementById('panel-wishes');
    if (!panel) return;
    var editing = panel.classList.toggle('editing');
    btn.classList.toggle('active', editing);
  };

  /* ================================================================
     Init
     ================================================================ */
  function init() {
    var today = new Date();
    calYear = today.getFullYear();
    calMonth = today.getMonth() + 1;

    var cd = document.getElementById('check-date');
    var todayStr = fmtDate(today);
    if (cd) cd.value = todayStr;

    selectedDate = todayStr;
    initStudyPresets();
    bindAutoSave();
    lastSavedDate = todayStr;

    // 从页面嵌入数据获取初始统计（0 延迟）
    if (window.__INITIAL_STATS__) {
      var s = window.__INITIAL_STATS__;
      document.getElementById('stat-days').textContent = s.total_days;
      document.getElementById('stat-morning').textContent = s.total_morning;
      document.getElementById('stat-study').textContent = s.total_study;
      calendarStatus = s.calendar || {};
    }

    loadCheckin();
    loadStats();       // 异步刷新最新数据
    renderCalendar();  // 同步渲染 — calendarStatus 已有值
  }

  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', init);
  } else {
    init();
  }
})();